CVE-2017-1536 in WebSphere Portal
Summary
by MITRE
IBM Support Tools for Lotus WCM (IBM WebSphere Portal 7.0, 8.0, 8.5 and 9.0) is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. IBM X-Force ID: 130733.
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Analysis
by VulDB Data Team • 01/26/2021
The vulnerability identified as CVE-2017-1536 affects IBM Support Tools for Lotus Web Content Management within IBM WebSphere Portal versions 7.0, 8.0, 8.5, and 9.0. This cross-site scripting vulnerability represents a critical security flaw that undermines the integrity of the web interface by allowing malicious actors to inject arbitrary JavaScript code into the user interface. The vulnerability specifically targets the support tools component that administrators and users access through web browsers, creating a pathway for attackers to manipulate the intended functionality of the portal environment.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding mechanisms within the IBM Support Tools interface. When users interact with the web-based administrative tools, the application fails to properly sanitize user-supplied input before rendering it in the browser context. This allows attackers to craft malicious payloads that, when executed in a victim's browser session, can manipulate the web application's behavior. The flaw operates at the application layer where user-controllable parameters are processed without adequate sanitization measures, making it susceptible to XSS exploitation patterns commonly categorized under CWE-79.
The operational impact of this vulnerability extends beyond simple script execution, as it creates opportunities for session hijacking and credential theft within trusted user sessions. When an attacker successfully injects malicious JavaScript code, they can potentially access sensitive session tokens, cookies, and other authentication mechanisms that are typically protected within the browser environment. This poses significant risks to organizations relying on IBM WebSphere Portal for content management and collaboration, as compromised sessions could lead to unauthorized access to administrative functions, content manipulation, and potential data breaches. The vulnerability is particularly dangerous in enterprise environments where portal systems often contain sensitive business information and administrative controls.
Mitigation strategies for CVE-2017-1536 should prioritize immediate application of IBM's official security patches and updates released for affected WebSphere Portal versions. Organizations must implement comprehensive input validation mechanisms and output encoding practices to prevent unauthorized script injection. Security teams should consider implementing content security policies that restrict script execution within the portal environment and establish monitoring procedures to detect unusual user activity patterns that might indicate exploitation attempts. Additionally, network segmentation and privileged access controls should be enforced to limit the potential damage from successful attacks, while regular security assessments and penetration testing should be conducted to verify the effectiveness of implemented defenses against similar vulnerabilities.
The vulnerability aligns with ATT&CK technique T1059.007 for JavaScript execution and represents a classic example of how web application security flaws can be exploited to gain persistent access to enterprise systems. Organizations should also consider implementing web application firewalls and regular security training for administrators to recognize and respond to potential XSS attack vectors. The incident underscores the importance of maintaining up-to-date security patches and following secure coding practices that prevent input sanitization failures in web-based applications.